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5645649921 = 33750861711
BaseRepresentation
bin1010100001000000…
…11100100000000001
3112120110021201202020
411100200130200001
543030241244141
62332113512053
7256622142522
oct52040344001
915513251666
105645649921
11243790538a
121116872629
136bc84b872
143b7b2c849
15230990266
hex15081c801

5645649921 has 8 divisors (see below), whose sum is σ = 7730980224. Its totient is φ = 3662043120.

The previous prime is 5645649899. The next prime is 5645649931. The reversal of 5645649921 is 1299465465.

5645649921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5645649921 - 214 = 5645633537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5645649931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25430745 + ... + 25430966.

It is an arithmetic number, because the mean of its divisors is an integer number (966372528).

Almost surely, 25645649921 is an apocalyptic number.

It is an amenable number.

5645649921 is a deficient number, since it is larger than the sum of its proper divisors (2085330303).

5645649921 is a wasteful number, since it uses less digits than its factorization.

5645649921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50861751.

The product of its digits is 2332800, while the sum is 51.

The square root of 5645649921 is about 75137.5400249436. The cubic root of 5645649921 is about 1780.6202779767.

The spelling of 5645649921 in words is "five billion, six hundred forty-five million, six hundred forty-nine thousand, nine hundred twenty-one".

Divisors: 1 3 37 111 50861711 152585133 1881883307 5645649921